cover 1852-54 the so-called "Treasury Roulette" 1d., showing roulettes on all four sides, on neat envelope used locally in London and tied by fine London District Post "74" duplex cancellation of 31 January 1854; the envelope with two pinholes and light crease clear of adhesive. An exceptional example of this rare trial. Also an envelope apparently backstamped 5 December 1853 bearing a perforated 1d. from Bath to London. S.G. Spec. B2 (1)a, #3500. Photo